土石混合体细观特性研究现状及展望

发布时间：2019-05-05 12:18

【摘要】：土石混合体作为一种介于土体与破碎岩体之间的特殊地质材料越来越多地受到工程界及学术界的关注。土石混合体细观结构特性及物理力学特性的深入研究是当今工程建设的需要,也是理论岩土力学、计算岩土力学、试验岩土力学及应用岩土力学发展的必然。在总结国内外有关土石混合体研究现状的基础上,分别从土石混合体的细观结构特征、细观结构模型和细观力学特性3个方面对当前的研究成果进行了概括。在此基础上,总结了土石混合体细观特性研究方面存在的不足,指出开展不同细观尺度的实时加载试验,从不同试验尺度上研究土石混合体的局部变形特征是未来的研究方向;建立土石混合体细观损伤演化方程和本构方程,加强土石混合体环境依赖性方面的研究,通过细观试验建立土石混合体三维精细结构模型,开展土石混合体开裂方面的仿真计算,加强细宏观力学特征的关系性分析,揭示实时加载条件下内部微结构的演化过程是未来研究的趋势。
[Abstract]:As a special geological material between soil mass and broken rock mass, the soil-rock mixture has been paid more and more attention by the engineering and academic circles. The in-depth study on the meso-structure and physical and mechanical properties of soil-rock mixture is the requirement of engineering construction, and it is also the necessity of the development of theoretical geotechnical mechanics, computational geotechnical mechanics, experimental geotechnical mechanics and applied geotechnical mechanics. On the basis of summarizing the present research situation of soil-rock mixtures at home and abroad, the present research results are summarized from three aspects: the meso-structure characteristics of soil-rock mixtures, the meso-structure models and the micro-mechanical properties of soil-rock mixtures. On this basis, the shortcomings of the study on the meso-properties of the soil-rock mixture are summarized, and it is pointed out that the future research direction is to carry out real-time loading tests with different meso-scales and study the local deformation characteristics of the soil-rock mixture from different test scales. The meso-damage evolution equation and constitutive equation of soil-rock mixture are established to strengthen the study on environmental dependence of soil-rock mixture, and a three-dimensional fine structure model of soil-rock mixture is established by mesoscopic test. The simulation calculation on the cracking of soil-rock mixture is carried out to strengthen the relationship analysis of micro-mechanical characteristics and reveal that the evolution process of internal microstructure under real-time loading is the trend of future research.
【作者单位】：中国科学院地质与地球物理研究所工程地质力学重点实验室;中国科学院大学;
【基金】：国家重点基础研究发展973计划项目(2010CB731501) 国家自然科学基金项目(41227901,41272352,41202217)资助
【分类号】：TU42

【参考文献】